SEATTLE--(BUSINESS WIRE)--Calypso Medical Technologies, Inc., a developer of real-time localization technology used for the precise tracking of tumor targets, announced today that the University of Maryland Marlene and Stewart Greenebaum Cancer Center, a National Cancer Institute-designated cancer center in Baltimore, now offers the Calypso® System to provide accurate, precise, real-time tumor tracking for cancer patients undergoing external beam radiation therapy. With this installation, nine of the top 33 medical centers identified in U.S. News and World Report’s ranking of best U.S. cancer hospitals have adopted the Calypso System.